Smoke-abator.



L'. D. WEST.

SMOKE ABATOR.

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. 1 `A m t L T E E H 4 s T E E H s 2 Z3 hz mmm @mi/mm LEONIDAS D. WEST, OF DENVER, COLORADO.

SMOKE-ABATOR.

Specification of Letters Patent.

Patented Aug. 13,1918.

Application led December 2B, 1917. Serial No. 209,312.

To all 'lo/1.0m it 'may (fo/warn Be it known that l, LnoNnms D. Wes'r, a citizen of the United States, residing,r at Den ver, in the county of Denver and State of Colorado, have invented certain new and useful lniprovements in Smoke-Alnitors; and I do declare the following to be a full, clear,

Aand exact description of the invention, such as will enable others skilled in the art to which it appertains to ,make and use the same.

My invention relates to improvements in smoke abators of the type which are carried on the inner sides of the coaliug doors of furnaces; and one object is lo so improve upon the construction of the air heating device as to cause extremely slow passage oi air theretlu'ough, so that this ai r will become highly heated for obtaining the best results as it mixes with the gases within the lire box.

ln connection with the air healing device, one or more dampered openings may be employed for admitting additional air for :t predetermined time after-eenling, this air ,serving to mix with the gases distilled from the newly supplied coal, so that perfect combnstionot' all of such gases will take place to prevent smoking and accumulation oi soot; and a further object is to provide the air heating device with a plurality of air deflecting Webs positioned in the path of the incoming air through said dampered inlets, so that this air is spread over the fire box, thus prevent ing the gases and air from passing through the combustion chamber un mixed.

A still. further object is to so construct the above named webs as to cause them to act as a heat builer for the door and as `means for relatively bracing said door and the air healingdevice.

With the foregoing general objects in view, the invention resides in the novel features of construction and unique combinations of paris to be hereinafter fully described and claimed, the descriptive matter being supplemented by the arcompauying lrawlngs which form a part of this specification and in whichz- .Figure 1 is a front elevation of a furnace door equipped with the present invention;

Fig, 2 is a horizontal section on the plane of the line 2-2 of Fig. 1;

Fig. 3 is a vertical section on the plane indicated approximately on the line 3-3 of ["ig. `l g Fig. is a similar view on. the plane of the line -I-l of Fig. l; and

Fig Ii is a horizontal section on the plane o' the line 5-5 of Fig. 3. v

ln the 'drawings above briefly described, the numeral l designates the coaling door ot' the furnace, said door being oi any preierred `formation and having upper and lower lun'izontal air inlet openings 2 which are provided with pivoted dampers 3 linked together-for simultaneous operation in the same manner described specifically in my companion ll. S. application, Serial No. 209,311, liled December 28, 19.17. It will here be well,- howevcr, to designate the han die of the door by the numeral 4 and to identify the latch fon said handle by the character 5. Also, it may be briefly explained that when the handle 4 is raised to open the door l, it opens the dempers 3 and the latch 5 comes intoplay to hold them in open position until said latch is tripped either by hand or automatically as is the case with the application above referred to. ln either ease, the dampers will remain open a suiieient length of time to supply the requisite (piantity of fresh air to the lire box immediately after cooling, so that the newly distilled gases will be supplied with sutiieient oxygen to render then'i highly combustible. y

Contacting at its front side with the rear face of the door 1, is a hollow preferably rectangular air heating body (i, the ends ol said body preferably having angular webs 7 which abut the door as Shown clearly in Figs. 2, 3 and 5. (')ne or more tubular air vinlet-a8 are carried by the front side of the easing G, said inlets passing through suitable openings in the door and serving as `means for securing the heater 6 in place. 4Suitable apertured caps or the like 9 are provided'for the outer ends of the air inlets 8, the apertures of such caps being such as to permit only the proper amount of. air to enter, this amount being determined by experiment. It is obvious that'the caps 9 may be made in assorted sizes and that caps oi' the cor- .reet characteristics may thus be employed.

The rear -side of the hollow body 6 is formed with a pair of tubular bosses 10 which are alined with the alr inlets 8; and tubular air retarders 11 pass through said lOl] ers and slowly expelle bosses and are formed with open inner ends, abutting the casing Wall around the inlets 8, the outer ends of said retarders having integral closures 12 preferably flanged for engagement With the bosses as shown. Pins 13 or any other preferred means may be passed through the bosses 10 and through the retarders for holding the latter in lace. y Each :retarder 11 is preferably provid with a plurality of longitudinal auf outlet slots 14 which open through its inner'end, and also with a suitable, number of outlet perforations 15. By this arrangement, the air entering through the apertures of the caps 9, will be more orlesstralped inthe retardfrom 'the lat-ter through the several slots. and perforations, whereby this air is pre-heated before it is discharged into the main heating casing or body 6. In this 'casin the air is further heated and is permit to escape only'at a slow rate of Speed by the means now to be described.

An air Spraying nozzle 16 preferably of the construction shown for directing the air downwardly upon the fir-e is provided, said f nozzle 'having an integral air inlet neck 17 passing into the body 6 through a central tubular boss 18, the latter being preferably' located between they two bosses 10. The inner end of the neckl is open and is pref erably located adjacent the front Wall of the body-6 as shown clearly in Figs. 2 and 4,

said neck having a plurality of longitudinal air inlet 'slots 19 which open through its inner end as shown. A pin or bolt Q0 may be passed throu h the neck 17 and through 'the boss 18 for volding the nozzle and neck in place, but other suitable attaching means could Well be employed should occasion demand. Also, although I have shown and described two air inlets and. two retarders,

l it -is obvious that only one of each need be employed in some cases. The same may be said of the dampers 3 although two are preferably employed as shown.`

For the purpose of suliciently spreading the incoming air from the openings 2 over the fire box, a plurality of inclined Webs 21 are employed, said Webs inclining from the inner end portion of the body 6 to the door 1 and extending .across the path of the incoming air as will be clear from Figs. 3,

4 and 5.' The oppositesidcs of the Webs 21 are preferably'curved somewhat as seen in Figf and located at suitable angles to the path of the air to produce best results. These Webs are so arranged as to cause them to act as a heat buiier for the door 1, as preheati'ng means for the incoming air, as

spreading means for this air, and as means .for relatively' bracing the body 6 and the door 1. The ends of the Webs adjacent the body 6 are preferably of greater Width as will be clear from Figs. 3 and 4 and integral ears 23. These ears contatt with similar ears 24 cast on the body 6 and bolts or the like 25 are passed through the two sets of ears for the purpose of si-fcuring the Webs 21 rigidly in place.

In operation, the air heating body G supplies hot air continuously to the fire box as long as door 1 is closed. This Vair enters through the caps 9 and inlets 8 and is choked down by the retarders 1l, so that it becomes pre-heated. From these retarders, the air slowly enters the casing 6 through the .slots 14 and pcrforations 15, and in this. casing the air becomes highly heated. The escape of air from casing 6 is further choked down by the neck 17 of the nozzle 1G, since it is necessary for the escaping air to pass through the slots 19 and to enter to some extent through the open inner end of' said neck, but this end is in such ole proximity to the front Wall of the easing as to cause the air to impinge upon'the latter to insure further heating. As the air leaves the neck 17 and enters the nozzle 16, it suddenly expands and is here even further heated, so that it is discharged from the several perforations of said nozzle in the form of a plurality of jets.` These jets of highly heat ed air thoroughly mix with the gases in the fire box and cause complete combustion of the latter so that smoking and the formation of soot is prevented.

lVhen the door 1 is to .be opened for coalimportant that the dampers 3 be closed at the propertinie, since the admission of too much air merely chills the lire box. close the dempers the latch 5 may be released by hand or any preferred automatic release could Well be employed, such for instance as that shown in my companion case above referred to.

From the foregoing, taken in connection with the accompanying drawings, it will be obvious that although the several. features To so of my invention are comparatively simple and inexpensive, they will be highly efficient and' durable. Since probably the best results are obtained from the details shown, these details are preferably employed, but Within the scope of the invention as claimed, numerous minor changes may well be made.

heater for continuously supplying hot airl to the irebox and having adjacent said heater a dampered air iirlet for su plyilng additional air after coaling; of ap urality of webs extending at an angle from said heater to said door and disposed in the path of the incoming air from said inlet.

2. The combination with a furnace coaling door lhaving at its inner side an air heater for continuously supplying hot air to the fire boxy and having adjacent said heater a dampered air inlet for supplying additionaly air after coaling; of a plurality of webs extending at an angle from said heater to said door and disposed in the path of the incoming air from said inlet, the sides of said webs being disposed at angles to the path of the incoming air to spread such air over the fire box,

3. The combination with a furnace door having upper and lower dampered air inlet openings and an air heater between said openings for continuously supplying hot airto the fire box; of a plurality of webs extending at an angle from said heater to said d oor and substantially spanning said openings, the sides of said webs being disposed at angles to the paths of the inoming air to spread such air over the fire 4. A structure as specified in claim 3, together with a base bar to which one end of said webs is secured and means for securing said base bar to said heater.

5. A structure as specified in claim 3, to gether with a, base bar to which one end of said webs is secured, said base bar having an' integral ear, an additional ear on said heater with which said first named ear contacts, and a bolt passing through the two ears.

6. An air heater for furnaces comprising a hollow body having in its front side an air inlet opening and in its rear side an opening alined with said inlet opening, a tubular air retarder passing through said last named opening and having an open. front end abutting the front side of said body around said inlet opening, said retarder having restricted air outlet openings a` closure for and carried by the rear en of )aid retarder, and means for4 securing said retarder in place, said body having a hot air outlet.

7. An air heater for furnaces comprising a hollow body having in its front side an air inlet opening and in its rear side an addi` tional opening, an apertured air retarder in said body receiving the air from said inlet opening, and an air spray nozzle having a tubular apertured neck extending into said body through the opening in the rear side thereof. 1

8. An article of manufacture comprising a metal bar having a flat side adapted to bear against an air heating device on the interior of a furnace, said bar having a lateral apertured ear for securing it in place, and

a plurality of webs joined at one end to said bar and spaced apart along the same, said webs extending at an angle to the aforesaid flat side of the bar and being adapted to span an air inlet of the furnace.

' 9. An article of manufacture comprising an air spraying head having a, reduced air inlet neck open at its free end said neck having longitudinally disposed air inlet slots 'which open through said open end of the neck 10. .An air heater for furnaces comprisi ing an air heating easing heated by expo- I sure to the heat from the irebox and having area of said nozzle on the side thereof ,ad-`

jacent said end wall being substantially equal to the area of said. wall, whereby to y' shield the latter against the fire.

In testimony whereof I have hereunto set my4 hand.

LEONIDAS D. WEST. 

